package com.qiang.eduservice.service.impl;

import com.alibaba.excel.EasyExcel;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.qiang.eduservice.entity.EduSubject;
import com.qiang.eduservice.entity.excel.SubjectData;
import com.qiang.eduservice.entity.subject.OneSubject;
import com.qiang.eduservice.entity.subject.TwoSubject;
import com.qiang.eduservice.listener.SubjectExcelListener;
import com.qiang.eduservice.mapper.EduSubjectMapper;
import com.qiang.eduservice.service.EduSubjectService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 课程科目 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2020-12-10
 */
@Service
public class EduSubjectServiceImpl extends ServiceImpl<EduSubjectMapper, EduSubject> implements EduSubjectService {


    //上传课程分类
    @Override
    public void saveSubject(MultipartFile file,EduSubjectService subjectService) {
        try {
            //文件流
            InputStream inputStream = file.getInputStream();

            EasyExcel.read(inputStream, SubjectData.class, new SubjectExcelListener(subjectService)).sheet().doRead();
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    //查询分类列表（树形结构）
    @Override
    public List<OneSubject> getAllOneTwoSubject() {

        //查询一级分类
        QueryWrapper<EduSubject> wrapperOne = new QueryWrapper<>();
        wrapperOne.eq("parent_id","0");

        List<EduSubject> oneSubjectList = baseMapper.selectList(wrapperOne);


        //查询二级分类
        QueryWrapper<EduSubject> wrapperTwo = new QueryWrapper<>();
        wrapperTwo.ne("parent_id","0");

        List<EduSubject> twoSubjectList = baseMapper.selectList(wrapperTwo);


        //创建集合封装数据
        List<OneSubject> list = new ArrayList<>();

        //封装一级分类数据
        //查询出来所有的一级分类list集合遍历，得到每个一级分类对象，获取每个一级分类对象值，
        //封装到要求的list集合里面 List<OneSubject> list
        for (int i = 0; i <oneSubjectList.size() ; i++) {

            EduSubject eduSubject = oneSubjectList.get(i);

            OneSubject oneSubject = new OneSubject();
//            oneSubject.setId(eduSubject.getId());
//            oneSubject.setTitle(eduSubject.getTitle());

            BeanUtils.copyProperties(eduSubject,oneSubject);
            list.add(oneSubject);
            //在一级分类循环遍历查询所有的二级分类
            //创建list集合封装每个一级分类的二级分类
            List<TwoSubject> twoFinalSubjectList = new ArrayList<>();

            //遍历二级分类list集合
            for (int m = 0; m < twoSubjectList.size(); m++) {
                //获取每个二级分类
                EduSubject tSubject = twoSubjectList.get(m);
                //判断二级分类parentid和一级分类id是否一样
                if(tSubject.getParentId().equals(eduSubject.getId())) {
                    //把tSubject值复制到TwoSubject里面，放到twoFinalSubjectList里面
                    TwoSubject twoSubject = new TwoSubject();
                    BeanUtils.copyProperties(tSubject,twoSubject);
                    twoFinalSubjectList.add(twoSubject);
                }
            }
            //把一级下面所有二级分类放到一级分类里面
            oneSubject.setChildren(twoFinalSubjectList);
        }


        //封装二级分类数据



        return list;
    }
}
